<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">

    </div>
    <script src="./src/react.js"></script>
    <script src="./src/react-dom.js"></script>
    <script src="./src/babel.js"></script>

    <script type="text/babel">
        class Dian extends React.Component{
            constructor(){
                super()
                this.state={
                    n:1
                }
            }
           
            render(){
              return (
                <div>
                  <h1>{this.state.n}</h1>
                  {/*<button onClick={()=>this.dianji()}>点击</button>*/}
                   <button onClick={this.dianji.bind(this)}>点击</button>
                </div>
              )
            }
             dianji=()=>{
                console.log(this);
                let n =this.state.n+1
                this.setState({
                    n:n
                })
            }
        }
        ReactDOM.render(
                <Dian></Dian>,
                document.getElementById("app")
         )
    </script>
</body>

</html>